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ubuntu-linux-kernel/drivers/gpu/drm/i915/intel_dsi.c

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/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Jani Nikula <jani.nikula@intel.com>
*/
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/i915_drm.h>
#include <drm/drm_mipi_dsi.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include "intel_dsi.h"
/* return pixels in terms of txbyteclkhs */
static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
u16 burst_mode_ratio)
{
return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
8 * 100), lane_count);
}
/* return pixels equvalent to txbyteclkhs */
static u16 pixels_from_txbyteclkhs(u16 clk_hs, int bpp, int lane_count,
u16 burst_mode_ratio)
{
return DIV_ROUND_UP((clk_hs * lane_count * 8 * 100),
(bpp * burst_mode_ratio));
}
enum mipi_dsi_pixel_format pixel_format_from_register_bits(u32 fmt)
{
/* It just so happens the VBT matches register contents. */
switch (fmt) {
case VID_MODE_FORMAT_RGB888:
return MIPI_DSI_FMT_RGB888;
case VID_MODE_FORMAT_RGB666:
return MIPI_DSI_FMT_RGB666;
case VID_MODE_FORMAT_RGB666_PACKED:
return MIPI_DSI_FMT_RGB666_PACKED;
case VID_MODE_FORMAT_RGB565:
return MIPI_DSI_FMT_RGB565;
default:
MISSING_CASE(fmt);
return MIPI_DSI_FMT_RGB666;
}
}
void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
{
struct drm_encoder *encoder = &intel_dsi->base.base;
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
u32 mask;
mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
if (intel_wait_for_register(dev_priv,
MIPI_GEN_FIFO_STAT(port), mask, mask,
100))
DRM_ERROR("DPI FIFOs are not empty\n");
}
static void write_data(struct drm_i915_private *dev_priv,
i915_reg_t reg,
const u8 *data, u32 len)
{
u32 i, j;
for (i = 0; i < len; i += 4) {
u32 val = 0;
for (j = 0; j < min_t(u32, len - i, 4); j++)
val |= *data++ << 8 * j;
I915_WRITE(reg, val);
}
}
static void read_data(struct drm_i915_private *dev_priv,
i915_reg_t reg,
u8 *data, u32 len)
{
u32 i, j;
for (i = 0; i < len; i += 4) {
u32 val = I915_READ(reg);
for (j = 0; j < min_t(u32, len - i, 4); j++)
*data++ = val >> 8 * j;
}
}
static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
struct drm_device *dev = intel_dsi_host->intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum port port = intel_dsi_host->port;
struct mipi_dsi_packet packet;
ssize_t ret;
const u8 *header, *data;
i915_reg_t data_reg, ctrl_reg;
u32 data_mask, ctrl_mask;
ret = mipi_dsi_create_packet(&packet, msg);
if (ret < 0)
return ret;
header = packet.header;
data = packet.payload;
if (msg->flags & MIPI_DSI_MSG_USE_LPM) {
data_reg = MIPI_LP_GEN_DATA(port);
data_mask = LP_DATA_FIFO_FULL;
ctrl_reg = MIPI_LP_GEN_CTRL(port);
ctrl_mask = LP_CTRL_FIFO_FULL;
} else {
data_reg = MIPI_HS_GEN_DATA(port);
data_mask = HS_DATA_FIFO_FULL;
ctrl_reg = MIPI_HS_GEN_CTRL(port);
ctrl_mask = HS_CTRL_FIFO_FULL;
}
/* note: this is never true for reads */
if (packet.payload_length) {
if (intel_wait_for_register(dev_priv,
MIPI_GEN_FIFO_STAT(port),
data_mask, 0,
50))
DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n");
write_data(dev_priv, data_reg, packet.payload,
packet.payload_length);
}
if (msg->rx_len) {
I915_WRITE(MIPI_INTR_STAT(port), GEN_READ_DATA_AVAIL);
}
if (intel_wait_for_register(dev_priv,
MIPI_GEN_FIFO_STAT(port),
ctrl_mask, 0,
50)) {
DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n");
}
I915_WRITE(ctrl_reg, header[2] << 16 | header[1] << 8 | header[0]);
/* ->rx_len is set only for reads */
if (msg->rx_len) {
data_mask = GEN_READ_DATA_AVAIL;
if (intel_wait_for_register(dev_priv,
MIPI_INTR_STAT(port),
data_mask, data_mask,
50))
DRM_ERROR("Timeout waiting for read data.\n");
read_data(dev_priv, data_reg, msg->rx_buf, msg->rx_len);
}
/* XXX: fix for reads and writes */
return 4 + packet.payload_length;
}
static int intel_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *dsi)
{
return 0;
}
static int intel_dsi_host_detach(struct mipi_dsi_host *host,
struct mipi_dsi_device *dsi)
{
return 0;
}
static const struct mipi_dsi_host_ops intel_dsi_host_ops = {
.attach = intel_dsi_host_attach,
.detach = intel_dsi_host_detach,
.transfer = intel_dsi_host_transfer,
};
static struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
enum port port)
{
struct intel_dsi_host *host;
struct mipi_dsi_device *device;
host = kzalloc(sizeof(*host), GFP_KERNEL);
if (!host)
return NULL;
host->base.ops = &intel_dsi_host_ops;
host->intel_dsi = intel_dsi;
host->port = port;
/*
* We should call mipi_dsi_host_register(&host->base) here, but we don't
* have a host->dev, and we don't have OF stuff either. So just use the
* dsi framework as a library and hope for the best. Create the dsi
* devices by ourselves here too. Need to be careful though, because we
* don't initialize any of the driver model devices here.
*/
device = kzalloc(sizeof(*device), GFP_KERNEL);
if (!device) {
kfree(host);
return NULL;
}
device->host = &host->base;
host->device = device;
return host;
}
/*
* send a video mode command
*
* XXX: commands with data in MIPI_DPI_DATA?
*/
static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
enum port port)
{
struct drm_encoder *encoder = &intel_dsi->base.base;
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
u32 mask;
/* XXX: pipe, hs */
if (hs)
cmd &= ~DPI_LP_MODE;
else
cmd |= DPI_LP_MODE;
/* clear bit */
I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT);
/* XXX: old code skips write if control unchanged */
if (cmd == I915_READ(MIPI_DPI_CONTROL(port)))
DRM_DEBUG_KMS("Same special packet %02x twice in a row.\n", cmd);
I915_WRITE(MIPI_DPI_CONTROL(port), cmd);
mask = SPL_PKT_SENT_INTERRUPT;
if (intel_wait_for_register(dev_priv,
MIPI_INTR_STAT(port), mask, mask,
100))
DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
return 0;
}
static void band_gap_reset(struct drm_i915_private *dev_priv)
{
mutex_lock(&dev_priv->sb_lock);
vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
vlv_flisdsi_write(dev_priv, 0x0F, 0x0025);
udelay(150);
vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
mutex_unlock(&dev_priv->sb_lock);
}
static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
{
return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
}
static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
{
return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
}
static bool intel_dsi_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
base);
struct intel_connector *intel_connector = intel_dsi->attached_connector;
struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
int ret;
DRM_DEBUG_KMS("\n");
if (fixed_mode) {
intel_fixed_panel_mode(fixed_mode, adjusted_mode);
if (HAS_GMCH_DISPLAY(dev_priv))
intel_gmch_panel_fitting(crtc, pipe_config,
conn_state->scaling_mode);
else
intel_pch_panel_fitting(crtc, pipe_config,
conn_state->scaling_mode);
}
/* DSI uses short packets for sync events, so clear mode flags for DSI */
adjusted_mode->flags = 0;
if (IS_GEN9_LP(dev_priv)) {
/* Enable Frame time stamp based scanline reporting */
adjusted_mode->private_flags |=
I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
/* Dual link goes to DSI transcoder A. */
if (intel_dsi->ports == BIT(PORT_C))
pipe_config->cpu_transcoder = TRANSCODER_DSI_C;
else
pipe_config->cpu_transcoder = TRANSCODER_DSI_A;
}
ret = intel_compute_dsi_pll(encoder, pipe_config);
if (ret)
return false;
pipe_config->clock_set = true;
return true;
}
static bool glk_dsi_enable_io(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 tmp;
bool cold_boot = false;
/* Set the MIPI mode
* If MIPI_Mode is off, then writing to LP_Wake bit is not reflecting.
* Power ON MIPI IO first and then write into IO reset and LP wake bits
*/
for_each_dsi_port(port, intel_dsi->ports) {
tmp = I915_READ(MIPI_CTRL(port));
I915_WRITE(MIPI_CTRL(port), tmp | GLK_MIPIIO_ENABLE);
}
/* Put the IO into reset */
tmp = I915_READ(MIPI_CTRL(PORT_A));
tmp &= ~GLK_MIPIIO_RESET_RELEASED;
I915_WRITE(MIPI_CTRL(PORT_A), tmp);
/* Program LP Wake */
for_each_dsi_port(port, intel_dsi->ports) {
tmp = I915_READ(MIPI_CTRL(port));
if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY))
tmp &= ~GLK_LP_WAKE;
else
tmp |= GLK_LP_WAKE;
I915_WRITE(MIPI_CTRL(port), tmp);
}
/* Wait for Pwr ACK */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port), GLK_MIPIIO_PORT_POWERED,
GLK_MIPIIO_PORT_POWERED, 20))
DRM_ERROR("MIPIO port is powergated\n");
}
/* Check for cold boot scenario */
for_each_dsi_port(port, intel_dsi->ports) {
cold_boot |= !(I915_READ(MIPI_DEVICE_READY(port)) &
DEVICE_READY);
}
return cold_boot;
}
static void glk_dsi_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
/* Wait for MIPI PHY status bit to set */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port), GLK_PHY_STATUS_PORT_READY,
GLK_PHY_STATUS_PORT_READY, 20))
DRM_ERROR("PHY is not ON\n");
}
/* Get IO out of reset */
val = I915_READ(MIPI_CTRL(PORT_A));
I915_WRITE(MIPI_CTRL(PORT_A), val | GLK_MIPIIO_RESET_RELEASED);
/* Get IO out of Low power state*/
for_each_dsi_port(port, intel_dsi->ports) {
if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY)) {
val = I915_READ(MIPI_DEVICE_READY(port));
val &= ~ULPS_STATE_MASK;
val |= DEVICE_READY;
I915_WRITE(MIPI_DEVICE_READY(port), val);
usleep_range(10, 15);
} else {
/* Enter ULPS */
val = I915_READ(MIPI_DEVICE_READY(port));
val &= ~ULPS_STATE_MASK;
val |= (ULPS_STATE_ENTER | DEVICE_READY);
I915_WRITE(MIPI_DEVICE_READY(port), val);
/* Wait for ULPS active */
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE, 0, 20))
DRM_ERROR("ULPS not active\n");
/* Exit ULPS */
val = I915_READ(MIPI_DEVICE_READY(port));
val &= ~ULPS_STATE_MASK;
val |= (ULPS_STATE_EXIT | DEVICE_READY);
I915_WRITE(MIPI_DEVICE_READY(port), val);
/* Enter Normal Mode */
val = I915_READ(MIPI_DEVICE_READY(port));
val &= ~ULPS_STATE_MASK;
val |= (ULPS_STATE_NORMAL_OPERATION | DEVICE_READY);
I915_WRITE(MIPI_DEVICE_READY(port), val);
val = I915_READ(MIPI_CTRL(port));
val &= ~GLK_LP_WAKE;
I915_WRITE(MIPI_CTRL(port), val);
}
}
/* Wait for Stop state */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port), GLK_DATA_LANE_STOP_STATE,
GLK_DATA_LANE_STOP_STATE, 20))
DRM_ERROR("Date lane not in STOP state\n");
}
/* Wait for AFE LATCH */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
BXT_MIPI_PORT_CTRL(port), AFE_LATCHOUT,
AFE_LATCHOUT, 20))
DRM_ERROR("D-PHY not entering LP-11 state\n");
}
}
static void bxt_dsi_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
DRM_DEBUG_KMS("\n");
/* Enable MIPI PHY transparent latch */
for_each_dsi_port(port, intel_dsi->ports) {
val = I915_READ(BXT_MIPI_PORT_CTRL(port));
I915_WRITE(BXT_MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD);
usleep_range(2000, 2500);
}
/* Clear ULPS and set device ready */
for_each_dsi_port(port, intel_dsi->ports) {
val = I915_READ(MIPI_DEVICE_READY(port));
val &= ~ULPS_STATE_MASK;
I915_WRITE(MIPI_DEVICE_READY(port), val);
usleep_range(2000, 2500);
val |= DEVICE_READY;
I915_WRITE(MIPI_DEVICE_READY(port), val);
}
}
static void vlv_dsi_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
DRM_DEBUG_KMS("\n");
mutex_lock(&dev_priv->sb_lock);
/* program rcomp for compliance, reduce from 50 ohms to 45 ohms
* needed everytime after power gate */
vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
mutex_unlock(&dev_priv->sb_lock);
/* bandgap reset is needed after everytime we do power gate */
band_gap_reset(dev_priv);
for_each_dsi_port(port, intel_dsi->ports) {
I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_ENTER);
usleep_range(2500, 3000);
/* Enable MIPI PHY transparent latch
* Common bit for both MIPI Port A & MIPI Port C
* No similar bit in MIPI Port C reg
*/
val = I915_READ(MIPI_PORT_CTRL(PORT_A));
I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD);
usleep_range(1000, 1500);
I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT);
usleep_range(2500, 3000);
I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY);
usleep_range(2500, 3000);
}
}
static void intel_dsi_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
vlv_dsi_device_ready(encoder);
else if (IS_BROXTON(dev_priv))
bxt_dsi_device_ready(encoder);
else if (IS_GEMINILAKE(dev_priv))
glk_dsi_device_ready(encoder);
}
static void glk_dsi_enter_low_power_mode(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
/* Enter ULPS */
for_each_dsi_port(port, intel_dsi->ports) {
val = I915_READ(MIPI_DEVICE_READY(port));
val &= ~ULPS_STATE_MASK;
val |= (ULPS_STATE_ENTER | DEVICE_READY);
I915_WRITE(MIPI_DEVICE_READY(port), val);
}
/* Wait for MIPI PHY status bit to unset */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port),
GLK_PHY_STATUS_PORT_READY, 0, 20))
DRM_ERROR("PHY is not turning OFF\n");
}
/* Wait for Pwr ACK bit to unset */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port),
GLK_MIPIIO_PORT_POWERED, 0, 20))
DRM_ERROR("MIPI IO Port is not powergated\n");
}
}
static void glk_dsi_disable_mipi_io(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 tmp;
/* Put the IO into reset */
tmp = I915_READ(MIPI_CTRL(PORT_A));
tmp &= ~GLK_MIPIIO_RESET_RELEASED;
I915_WRITE(MIPI_CTRL(PORT_A), tmp);
/* Wait for MIPI PHY status bit to unset */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_wait_for_register(dev_priv,
MIPI_CTRL(port),
GLK_PHY_STATUS_PORT_READY, 0, 20))
DRM_ERROR("PHY is not turning OFF\n");
}
/* Clear MIPI mode */
for_each_dsi_port(port, intel_dsi->ports) {
tmp = I915_READ(MIPI_CTRL(port));
tmp &= ~GLK_MIPIIO_ENABLE;
I915_WRITE(MIPI_CTRL(port), tmp);
}
}
static void glk_dsi_clear_device_ready(struct intel_encoder *encoder)
{
glk_dsi_enter_low_power_mode(encoder);
glk_dsi_disable_mipi_io(encoder);
}
static void vlv_dsi_clear_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
DRM_DEBUG_KMS("\n");
for_each_dsi_port(port, intel_dsi->ports) {
/* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */
i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ?
BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(PORT_A);
u32 val;
I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
ULPS_STATE_ENTER);
usleep_range(2000, 2500);
I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
ULPS_STATE_EXIT);
usleep_range(2000, 2500);
I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY |
ULPS_STATE_ENTER);
usleep_range(2000, 2500);
/*
* On VLV/CHV, wait till Clock lanes are in LP-00 state for MIPI
* Port A only. MIPI Port C has no similar bit for checking.
*/
if ((IS_GEN9_LP(dev_priv) || port == PORT_A) &&
intel_wait_for_register(dev_priv,
port_ctrl, AFE_LATCHOUT, 0,
30))
DRM_ERROR("DSI LP not going Low\n");
/* Disable MIPI PHY transparent latch */
val = I915_READ(port_ctrl);
I915_WRITE(port_ctrl, val & ~LP_OUTPUT_HOLD);
usleep_range(1000, 1500);
I915_WRITE(MIPI_DEVICE_READY(port), 0x00);
usleep_range(2000, 2500);
}
}
static void intel_dsi_port_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
u32 temp;
if (IS_GEN9_LP(dev_priv)) {
for_each_dsi_port(port, intel_dsi->ports) {
temp = I915_READ(MIPI_CTRL(port));
temp &= ~BXT_PIXEL_OVERLAP_CNT_MASK |
intel_dsi->pixel_overlap <<
BXT_PIXEL_OVERLAP_CNT_SHIFT;
I915_WRITE(MIPI_CTRL(port), temp);
}
} else {
temp = I915_READ(VLV_CHICKEN_3);
temp &= ~PIXEL_OVERLAP_CNT_MASK |
intel_dsi->pixel_overlap <<
PIXEL_OVERLAP_CNT_SHIFT;
I915_WRITE(VLV_CHICKEN_3, temp);
}
}
for_each_dsi_port(port, intel_dsi->ports) {
i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ?
BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
u32 temp;
temp = I915_READ(port_ctrl);
temp &= ~LANE_CONFIGURATION_MASK;
temp &= ~DUAL_LINK_MODE_MASK;
if (intel_dsi->ports == (BIT(PORT_A) | BIT(PORT_C))) {
temp |= (intel_dsi->dual_link - 1)
<< DUAL_LINK_MODE_SHIFT;
if (IS_BROXTON(dev_priv))
temp |= LANE_CONFIGURATION_DUAL_LINK_A;
else
temp |= intel_crtc->pipe ?
LANE_CONFIGURATION_DUAL_LINK_B :
LANE_CONFIGURATION_DUAL_LINK_A;
}
/* assert ip_tg_enable signal */
I915_WRITE(port_ctrl, temp | DPI_ENABLE);
POSTING_READ(port_ctrl);
}
}
static void intel_dsi_port_disable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
for_each_dsi_port(port, intel_dsi->ports) {
i915_reg_t port_ctrl = IS_GEN9_LP(dev_priv) ?
BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
u32 temp;
/* de-assert ip_tg_enable signal */
temp = I915_READ(port_ctrl);
I915_WRITE(port_ctrl, temp & ~DPI_ENABLE);
POSTING_READ(port_ctrl);
}
}
static void intel_dsi_prepare(struct intel_encoder *intel_encoder,
const struct intel_crtc_state *pipe_config);
static void intel_dsi_unprepare(struct intel_encoder *encoder);
static void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
{
struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
/* For v3 VBTs in vid-mode the delays are part of the VBT sequences */
if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3)
return;
msleep(msec);
}
/*
* Panel enable/disable sequences from the VBT spec.
*
* Note the spec has AssertReset / DeassertReset swapped from their
* usual naming. We use the normal names to avoid confusion (so below
* they are swapped compared to the spec).
*
* Steps starting with MIPI refer to VBT sequences, note that for v2
* VBTs several steps which have a VBT in v2 are expected to be handled
* directly by the driver, by directly driving gpios for example.
*
* v2 video mode seq v3 video mode seq command mode seq
* - power on - MIPIPanelPowerOn - power on
* - wait t1+t2 - wait t1+t2
* - MIPIDeassertResetPin - MIPIDeassertResetPin - MIPIDeassertResetPin
* - io lines to lp-11 - io lines to lp-11 - io lines to lp-11
* - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds
* - MIPITearOn
* - MIPIDisplayOn
* - turn on DPI - turn on DPI - set pipe to dsr mode
* - MIPIDisplayOn - MIPIDisplayOn
* - wait t5 - wait t5
* - backlight on - MIPIBacklightOn - backlight on
* ... ... ... issue mem cmds ...
* - backlight off - MIPIBacklightOff - backlight off
* - wait t6 - wait t6
* - MIPIDisplayOff
* - turn off DPI - turn off DPI - disable pipe dsr mode
* - MIPITearOff
* - MIPIDisplayOff - MIPIDisplayOff
* - io lines to lp-00 - io lines to lp-00 - io lines to lp-00
* - MIPIAssertResetPin - MIPIAssertResetPin - MIPIAssertResetPin
* - wait t3 - wait t3
* - power off - MIPIPanelPowerOff - power off
* - wait t4 - wait t4
*/
static void intel_dsi_pre_enable(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config,
const struct drm_connector_state *conn_state)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct drm_crtc *crtc = pipe_config->base.crtc;
struct drm_i915_private *dev_priv = to_i915(crtc->dev);
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
enum port port;
u32 val;
bool glk_cold_boot = false;
DRM_DEBUG_KMS("\n");
intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
/*
* The BIOS may leave the PLL in a wonky state where it doesn't
* lock. It needs to be fully powered down to fix it.
*/
intel_disable_dsi_pll(encoder);
intel_enable_dsi_pll(encoder, pipe_config);
if (IS_BROXTON(dev_priv)) {
/* Add MIPI IO reset programming for modeset */
val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
I915_WRITE(BXT_P_CR_GT_DISP_PWRON,
val | MIPIO_RST_CTRL);
/* Power up DSI regulator */
I915_WRITE(BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
I915_WRITE(BXT_P_DSI_REGULATOR_TX_CTRL, 0);
}
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
u32 val;
/* Disable DPOunit clock gating, can stall pipe */
val = I915_READ(DSPCLK_GATE_D);
val |= DPOUNIT_CLOCK_GATE_DISABLE;
I915_WRITE(DSPCLK_GATE_D, val);
}
if (!IS_GEMINILAKE(dev_priv))
intel_dsi_prepare(encoder, pipe_config);
/* Power on, try both CRC pmic gpio and VBT */
if (intel_dsi->gpio_panel)
gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
intel_dsi_msleep(intel_dsi, intel_dsi->panel_on_delay);
/* Deassert reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
if (IS_GEMINILAKE(dev_priv)) {
glk_cold_boot = glk_dsi_enable_io(encoder);
/* Prepare port in cold boot(s3/s4) scenario */
if (glk_cold_boot)
intel_dsi_prepare(encoder, pipe_config);
}
/* Put device in ready state (LP-11) */
intel_dsi_device_ready(encoder);
/* Prepare port in normal boot scenario */
if (IS_GEMINILAKE(dev_priv) && !glk_cold_boot)
intel_dsi_prepare(encoder, pipe_config);
/* Send initialization commands in LP mode */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP);
/* Enable port in pre-enable phase itself because as per hw team
* recommendation, port should be enabled befor plane & pipe */
if (is_cmd_mode(intel_dsi)) {
for_each_dsi_port(port, intel_dsi->ports)
I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_ON);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
} else {
msleep(20); /* XXX */
for_each_dsi_port(port, intel_dsi->ports)
dpi_send_cmd(intel_dsi, TURN_ON, false, port);
intel_dsi_msleep(intel_dsi, 100);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
intel_dsi_port_enable(encoder);
}
intel_panel_enable_backlight(pipe_config, conn_state);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON);
}
/*
* DSI port enable has to be done before pipe and plane enable, so we do it in
* the pre_enable hook.
*/
static void intel_dsi_enable_nop(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config,
const struct drm_connector_state *conn_state)
{
DRM_DEBUG_KMS("\n");
}
/*
* DSI port disable has to be done after pipe and plane disable, so we do it in
* the post_disable hook.
*/
static void intel_dsi_disable(struct intel_encoder *encoder,
const struct intel_crtc_state *old_crtc_state,
const struct drm_connector_state *old_conn_state)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
DRM_DEBUG_KMS("\n");
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF);
intel_panel_disable_backlight(old_conn_state);
/*
* According to the spec we should send SHUTDOWN before
* MIPI_SEQ_DISPLAY_OFF only for v3+ VBTs, but field testing
* has shown that the v3 sequence works for v2 VBTs too
*/
if (is_vid_mode(intel_dsi)) {
/* Send Shutdown command to the panel in LP mode */
for_each_dsi_port(port, intel_dsi->ports)
dpi_send_cmd(intel_dsi, SHUTDOWN, false, port);
msleep(10);
}
}
static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
IS_BROXTON(dev_priv))
vlv_dsi_clear_device_ready(encoder);
else if (IS_GEMINILAKE(dev_priv))
glk_dsi_clear_device_ready(encoder);
}
static void intel_dsi_post_disable(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config,
const struct drm_connector_state *conn_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
DRM_DEBUG_KMS("\n");
if (is_vid_mode(intel_dsi)) {
for_each_dsi_port(port, intel_dsi->ports)
wait_for_dsi_fifo_empty(intel_dsi, port);
intel_dsi_port_disable(encoder);
usleep_range(2000, 5000);
}
intel_dsi_unprepare(encoder);
/*
* if disable packets are sent before sending shutdown packet then in
* some next enable sequence send turn on packet error is observed
*/
if (is_cmd_mode(intel_dsi))
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_OFF);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF);
/* Transition to LP-00 */
intel_dsi_clear_device_ready(encoder);
if (IS_BROXTON(dev_priv)) {
/* Power down DSI regulator to save power */
I915_WRITE(BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
I915_WRITE(BXT_P_DSI_REGULATOR_TX_CTRL, HS_IO_CTRL_SELECT);
/* Add MIPI IO reset programming for modeset */
val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
I915_WRITE(BXT_P_CR_GT_DISP_PWRON,
val & ~MIPIO_RST_CTRL);
}
intel_disable_dsi_pll(encoder);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
u32 val;
val = I915_READ(DSPCLK_GATE_D);
val &= ~DPOUNIT_CLOCK_GATE_DISABLE;
I915_WRITE(DSPCLK_GATE_D, val);
}
/* Assert reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
/* Power off, try both CRC pmic gpio and VBT */
intel_dsi_msleep(intel_dsi, intel_dsi->panel_off_delay);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
if (intel_dsi->gpio_panel)
gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
/*
* FIXME As we do with eDP, just make a note of the time here
* and perform the wait before the next panel power on.
*/
intel_dsi_msleep(intel_dsi, intel_dsi->panel_pwr_cycle_delay);
}
static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
enum pipe *pipe)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
bool active = false;
DRM_DEBUG_KMS("\n");
if (!intel_display_power_get_if_enabled(dev_priv,
encoder->power_domain))
return false;
/*
* On Broxton the PLL needs to be enabled with a valid divider
* configuration, otherwise accessing DSI registers will hang the
* machine. See BSpec North Display Engine registers/MIPI[BXT].
*/
if (IS_GEN9_LP(dev_priv) && !intel_dsi_pll_is_enabled(dev_priv))
goto out_put_power;
/* XXX: this only works for one DSI output */
for_each_dsi_port(port, intel_dsi->ports) {
i915_reg_t ctrl_reg = IS_GEN9_LP(dev_priv) ?
BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
bool enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
/*
* Due to some hardware limitations on VLV/CHV, the DPI enable
* bit in port C control register does not get set. As a
* workaround, check pipe B conf instead.
*/
if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
port == PORT_C)
enabled = I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
/* Try command mode if video mode not enabled */
if (!enabled) {
u32 tmp = I915_READ(MIPI_DSI_FUNC_PRG(port));
enabled = tmp & CMD_MODE_DATA_WIDTH_MASK;
}
if (!enabled)
continue;
if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY))
continue;
if (IS_GEN9_LP(dev_priv)) {
u32 tmp = I915_READ(MIPI_CTRL(port));
tmp &= BXT_PIPE_SELECT_MASK;
tmp >>= BXT_PIPE_SELECT_SHIFT;
if (WARN_ON(tmp > PIPE_C))
continue;
*pipe = tmp;
} else {
*pipe = port == PORT_A ? PIPE_A : PIPE_B;
}
active = true;
break;
}
out_put_power:
intel_display_power_put(dev_priv, encoder->power_domain);
return active;
}
static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct drm_display_mode *adjusted_mode =
&pipe_config->base.adjusted_mode;
struct drm_display_mode *adjusted_mode_sw;
struct intel_crtc *intel_crtc;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
unsigned int lane_count = intel_dsi->lane_count;
unsigned int bpp, fmt;
enum port port;
u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
u16 hfp_sw, hsync_sw, hbp_sw;
u16 crtc_htotal_sw, crtc_hsync_start_sw, crtc_hsync_end_sw,
crtc_hblank_start_sw, crtc_hblank_end_sw;
/* FIXME: hw readout should not depend on SW state */
intel_crtc = to_intel_crtc(encoder->base.crtc);
adjusted_mode_sw = &intel_crtc->config->base.adjusted_mode;
/*
* Atleast one port is active as encoder->get_config called only if
* encoder->get_hw_state() returns true.
*/
for_each_dsi_port(port, intel_dsi->ports) {
if (I915_READ(BXT_MIPI_PORT_CTRL(port)) & DPI_ENABLE)
break;
}
fmt = I915_READ(MIPI_DSI_FUNC_PRG(port)) & VID_MODE_FORMAT_MASK;
pipe_config->pipe_bpp =
mipi_dsi_pixel_format_to_bpp(
pixel_format_from_register_bits(fmt));
bpp = pipe_config->pipe_bpp;
/* Enable Frame time stamo based scanline reporting */
adjusted_mode->private_flags |=
I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
/* In terms of pixels */
adjusted_mode->crtc_hdisplay =
I915_READ(BXT_MIPI_TRANS_HACTIVE(port));
adjusted_mode->crtc_vdisplay =
I915_READ(BXT_MIPI_TRANS_VACTIVE(port));
adjusted_mode->crtc_vtotal =
I915_READ(BXT_MIPI_TRANS_VTOTAL(port));
hactive = adjusted_mode->crtc_hdisplay;
hfp = I915_READ(MIPI_HFP_COUNT(port));
/*
* Meaningful for video mode non-burst sync pulse mode only,
* can be zero for non-burst sync events and burst modes
*/
hsync = I915_READ(MIPI_HSYNC_PADDING_COUNT(port));
hbp = I915_READ(MIPI_HBP_COUNT(port));
/* harizontal values are in terms of high speed byte clock */
hfp = pixels_from_txbyteclkhs(hfp, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hsync = pixels_from_txbyteclkhs(hsync, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp = pixels_from_txbyteclkhs(hbp, bpp, lane_count,
intel_dsi->burst_mode_ratio);
if (intel_dsi->dual_link) {
hfp *= 2;
hsync *= 2;
hbp *= 2;
}
/* vertical values are in terms of lines */
vfp = I915_READ(MIPI_VFP_COUNT(port));
vsync = I915_READ(MIPI_VSYNC_PADDING_COUNT(port));
vbp = I915_READ(MIPI_VBP_COUNT(port));
adjusted_mode->crtc_htotal = hactive + hfp + hsync + hbp;
adjusted_mode->crtc_hsync_start = hfp + adjusted_mode->crtc_hdisplay;
adjusted_mode->crtc_hsync_end = hsync + adjusted_mode->crtc_hsync_start;
adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay;
adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal;
adjusted_mode->crtc_vsync_start = vfp + adjusted_mode->crtc_vdisplay;
adjusted_mode->crtc_vsync_end = vsync + adjusted_mode->crtc_vsync_start;
adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay;
adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
/*
* In BXT DSI there is no regs programmed with few horizontal timings
* in Pixels but txbyteclkhs.. So retrieval process adds some
* ROUND_UP ERRORS in the process of PIXELS<==>txbyteclkhs.
* Actually here for the given adjusted_mode, we are calculating the
* value programmed to the port and then back to the horizontal timing
* param in pixels. This is the expected value, including roundup errors
* And if that is same as retrieved value from port, then
* (HW state) adjusted_mode's horizontal timings are corrected to
* match with SW state to nullify the errors.
*/
/* Calculating the value programmed to the Port register */
hfp_sw = adjusted_mode_sw->crtc_hsync_start -
adjusted_mode_sw->crtc_hdisplay;
hsync_sw = adjusted_mode_sw->crtc_hsync_end -
adjusted_mode_sw->crtc_hsync_start;
hbp_sw = adjusted_mode_sw->crtc_htotal -
adjusted_mode_sw->crtc_hsync_end;
if (intel_dsi->dual_link) {
hfp_sw /= 2;
hsync_sw /= 2;
hbp_sw /= 2;
}
hfp_sw = txbyteclkhs(hfp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hsync_sw = txbyteclkhs(hsync_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp_sw = txbyteclkhs(hbp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
/* Reverse calculating the adjusted mode parameters from port reg vals*/
hfp_sw = pixels_from_txbyteclkhs(hfp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hsync_sw = pixels_from_txbyteclkhs(hsync_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp_sw = pixels_from_txbyteclkhs(hbp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
if (intel_dsi->dual_link) {
hfp_sw *= 2;
hsync_sw *= 2;
hbp_sw *= 2;
}
crtc_htotal_sw = adjusted_mode_sw->crtc_hdisplay + hfp_sw +
hsync_sw + hbp_sw;
crtc_hsync_start_sw = hfp_sw + adjusted_mode_sw->crtc_hdisplay;
crtc_hsync_end_sw = hsync_sw + crtc_hsync_start_sw;
crtc_hblank_start_sw = adjusted_mode_sw->crtc_hdisplay;
crtc_hblank_end_sw = crtc_htotal_sw;
if (adjusted_mode->crtc_htotal == crtc_htotal_sw)
adjusted_mode->crtc_htotal = adjusted_mode_sw->crtc_htotal;
if (adjusted_mode->crtc_hsync_start == crtc_hsync_start_sw)
adjusted_mode->crtc_hsync_start =
adjusted_mode_sw->crtc_hsync_start;
if (adjusted_mode->crtc_hsync_end == crtc_hsync_end_sw)
adjusted_mode->crtc_hsync_end =
adjusted_mode_sw->crtc_hsync_end;
if (adjusted_mode->crtc_hblank_start == crtc_hblank_start_sw)
adjusted_mode->crtc_hblank_start =
adjusted_mode_sw->crtc_hblank_start;
if (adjusted_mode->crtc_hblank_end == crtc_hblank_end_sw)
adjusted_mode->crtc_hblank_end =
adjusted_mode_sw->crtc_hblank_end;
}
static void intel_dsi_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
u32 pclk;
DRM_DEBUG_KMS("\n");
if (IS_GEN9_LP(dev_priv))
bxt_dsi_get_pipe_config(encoder, pipe_config);
pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp,
pipe_config);
if (!pclk)
return;
pipe_config->base.adjusted_mode.crtc_clock = pclk;
pipe_config->port_clock = pclk;
}
static enum drm_mode_status
intel_dsi_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
DRM_DEBUG_KMS("\n");
if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
DRM_DEBUG_KMS("MODE_NO_DBLESCAN\n");
return MODE_NO_DBLESCAN;
}
if (fixed_mode) {
if (mode->hdisplay > fixed_mode->hdisplay)
return MODE_PANEL;
if (mode->vdisplay > fixed_mode->vdisplay)
return MODE_PANEL;
if (fixed_mode->clock > max_dotclk)
return MODE_CLOCK_HIGH;
}
return MODE_OK;
}
/* return txclkesc cycles in terms of divider and duration in us */
static u16 txclkesc(u32 divider, unsigned int us)
{
switch (divider) {
case ESCAPE_CLOCK_DIVIDER_1:
default:
return 20 * us;
case ESCAPE_CLOCK_DIVIDER_2:
return 10 * us;
case ESCAPE_CLOCK_DIVIDER_4:
return 5 * us;
}
}
static void set_dsi_timings(struct drm_encoder *encoder,
const struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
unsigned int lane_count = intel_dsi->lane_count;
u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
hactive = adjusted_mode->crtc_hdisplay;
hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay;
hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end;
if (intel_dsi->dual_link) {
hactive /= 2;
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
hactive += intel_dsi->pixel_overlap;
hfp /= 2;
hsync /= 2;
hbp /= 2;
}
vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay;
vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end;
/* horizontal values are in terms of high speed byte clock */
hactive = txbyteclkhs(hactive, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
hsync = txbyteclkhs(hsync, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
for_each_dsi_port(port, intel_dsi->ports) {
if (IS_GEN9_LP(dev_priv)) {
/*
* Program hdisplay and vdisplay on MIPI transcoder.
* This is different from calculated hactive and
* vactive, as they are calculated per channel basis,
* whereas these values should be based on resolution.
*/
I915_WRITE(BXT_MIPI_TRANS_HACTIVE(port),
adjusted_mode->crtc_hdisplay);
I915_WRITE(BXT_MIPI_TRANS_VACTIVE(port),
adjusted_mode->crtc_vdisplay);
I915_WRITE(BXT_MIPI_TRANS_VTOTAL(port),
adjusted_mode->crtc_vtotal);
}
I915_WRITE(MIPI_HACTIVE_AREA_COUNT(port), hactive);
I915_WRITE(MIPI_HFP_COUNT(port), hfp);
/* meaningful for video mode non-burst sync pulse mode only,
* can be zero for non-burst sync events and burst modes */
I915_WRITE(MIPI_HSYNC_PADDING_COUNT(port), hsync);
I915_WRITE(MIPI_HBP_COUNT(port), hbp);
/* vertical values are in terms of lines */
I915_WRITE(MIPI_VFP_COUNT(port), vfp);
I915_WRITE(MIPI_VSYNC_PADDING_COUNT(port), vsync);
I915_WRITE(MIPI_VBP_COUNT(port), vbp);
}
}
static u32 pixel_format_to_reg(enum mipi_dsi_pixel_format fmt)
{
switch (fmt) {
case MIPI_DSI_FMT_RGB888:
return VID_MODE_FORMAT_RGB888;
case MIPI_DSI_FMT_RGB666:
return VID_MODE_FORMAT_RGB666;
case MIPI_DSI_FMT_RGB666_PACKED:
return VID_MODE_FORMAT_RGB666_PACKED;
case MIPI_DSI_FMT_RGB565:
return VID_MODE_FORMAT_RGB565;
default:
MISSING_CASE(fmt);
return VID_MODE_FORMAT_RGB666;
}
}
static void intel_dsi_prepare(struct intel_encoder *intel_encoder,
const struct intel_crtc_state *pipe_config)
{
struct drm_encoder *encoder = &intel_encoder->base;
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
enum port port;
unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
u32 val, tmp;
u16 mode_hdisplay;
DRM_DEBUG_KMS("pipe %c\n", pipe_name(intel_crtc->pipe));
mode_hdisplay = adjusted_mode->crtc_hdisplay;
if (intel_dsi->dual_link) {
mode_hdisplay /= 2;
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
mode_hdisplay += intel_dsi->pixel_overlap;
}
for_each_dsi_port(port, intel_dsi->ports) {
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
/*
* escape clock divider, 20MHz, shared for A and C.
* device ready must be off when doing this! txclkesc?
*/
tmp = I915_READ(MIPI_CTRL(PORT_A));
tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
I915_WRITE(MIPI_CTRL(PORT_A), tmp |
ESCAPE_CLOCK_DIVIDER_1);
/* read request priority is per pipe */
tmp = I915_READ(MIPI_CTRL(port));
tmp &= ~READ_REQUEST_PRIORITY_MASK;
I915_WRITE(MIPI_CTRL(port), tmp |
READ_REQUEST_PRIORITY_HIGH);
} else if (IS_GEN9_LP(dev_priv)) {
enum pipe pipe = intel_crtc->pipe;
tmp = I915_READ(MIPI_CTRL(port));
tmp &= ~BXT_PIPE_SELECT_MASK;
tmp |= BXT_PIPE_SELECT(pipe);
I915_WRITE(MIPI_CTRL(port), tmp);
}
/* XXX: why here, why like this? handling in irq handler?! */
I915_WRITE(MIPI_INTR_STAT(port), 0xffffffff);
I915_WRITE(MIPI_INTR_EN(port), 0xffffffff);
I915_WRITE(MIPI_DPHY_PARAM(port), intel_dsi->dphy_reg);
I915_WRITE(MIPI_DPI_RESOLUTION(port),
adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT |
mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT);
}
set_dsi_timings(encoder, adjusted_mode);
val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
if (is_cmd_mode(intel_dsi)) {
val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
} else {
val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
val |= pixel_format_to_reg(intel_dsi->pixel_format);
}
tmp = 0;
if (intel_dsi->eotp_pkt == 0)
tmp |= EOT_DISABLE;
if (intel_dsi->clock_stop)
tmp |= CLOCKSTOP;
if (IS_GEN9_LP(dev_priv)) {
tmp |= BXT_DPHY_DEFEATURE_EN;
if (!is_cmd_mode(intel_dsi))
tmp |= BXT_DEFEATURE_DPI_FIFO_CTR;
}
for_each_dsi_port(port, intel_dsi->ports) {
I915_WRITE(MIPI_DSI_FUNC_PRG(port), val);
/* timeouts for recovery. one frame IIUC. if counter expires,
* EOT and stop state. */
/*
* In burst mode, value greater than one DPI line Time in byte
* clock (txbyteclkhs) To timeout this timer 1+ of the above
* said value is recommended.
*
* In non-burst mode, Value greater than one DPI frame time in
* byte clock(txbyteclkhs) To timeout this timer 1+ of the above
* said value is recommended.
*
* In DBI only mode, value greater than one DBI frame time in
* byte clock(txbyteclkhs) To timeout this timer 1+ of the above
* said value is recommended.
*/
if (is_vid_mode(intel_dsi) &&
intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
txbyteclkhs(adjusted_mode->crtc_htotal, bpp,
intel_dsi->lane_count,
intel_dsi->burst_mode_ratio) + 1);
} else {
I915_WRITE(MIPI_HS_TX_TIMEOUT(port),
txbyteclkhs(adjusted_mode->crtc_vtotal *
adjusted_mode->crtc_htotal,
bpp, intel_dsi->lane_count,
intel_dsi->burst_mode_ratio) + 1);
}
I915_WRITE(MIPI_LP_RX_TIMEOUT(port), intel_dsi->lp_rx_timeout);
I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(port),
intel_dsi->turn_arnd_val);
I915_WRITE(MIPI_DEVICE_RESET_TIMER(port),
intel_dsi->rst_timer_val);
/* dphy stuff */
/* in terms of low power clock */
I915_WRITE(MIPI_INIT_COUNT(port),
txclkesc(intel_dsi->escape_clk_div, 100));
if (IS_GEN9_LP(dev_priv) && (!intel_dsi->dual_link)) {
/*
* BXT spec says write MIPI_INIT_COUNT for
* both the ports, even if only one is
* getting used. So write the other port
* if not in dual link mode.
*/
I915_WRITE(MIPI_INIT_COUNT(port ==
PORT_A ? PORT_C : PORT_A),
intel_dsi->init_count);
}
/* recovery disables */
I915_WRITE(MIPI_EOT_DISABLE(port), tmp);
/* in terms of low power clock */
I915_WRITE(MIPI_INIT_COUNT(port), intel_dsi->init_count);
/* in terms of txbyteclkhs. actual high to low switch +
* MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
*
* XXX: write MIPI_STOP_STATE_STALL?
*/
I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(port),
intel_dsi->hs_to_lp_count);
/* XXX: low power clock equivalence in terms of byte clock.
* the number of byte clocks occupied in one low power clock.
* based on txbyteclkhs and txclkesc.
* txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL
* ) / 105.???
*/
I915_WRITE(MIPI_LP_BYTECLK(port), intel_dsi->lp_byte_clk);
if (IS_GEMINILAKE(dev_priv)) {
I915_WRITE(MIPI_TLPX_TIME_COUNT(port),
intel_dsi->lp_byte_clk);
/* Shadow of DPHY reg */
I915_WRITE(MIPI_CLK_LANE_TIMING(port),
intel_dsi->dphy_reg);
}
/* the bw essential for transmitting 16 long packets containing
* 252 bytes meant for dcs write memory command is programmed in
* this register in terms of byte clocks. based on dsi transfer
* rate and the number of lanes configured the time taken to
* transmit 16 long packets in a dsi stream varies. */
I915_WRITE(MIPI_DBI_BW_CTRL(port), intel_dsi->bw_timer);
I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(port),
intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT |
intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
if (is_vid_mode(intel_dsi))
/* Some panels might have resolution which is not a
* multiple of 64 like 1366 x 768. Enable RANDOM
* resolution support for such panels by default */
I915_WRITE(MIPI_VIDEO_MODE_FORMAT(port),
intel_dsi->video_frmt_cfg_bits |
intel_dsi->video_mode_format |
IP_TG_CONFIG |
RANDOM_DPI_DISPLAY_RESOLUTION);
}
}
static void intel_dsi_unprepare(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
if (!IS_GEMINILAKE(dev_priv)) {
for_each_dsi_port(port, intel_dsi->ports) {
/* Panel commands can be sent when clock is in LP11 */
I915_WRITE(MIPI_DEVICE_READY(port), 0x0);
intel_dsi_reset_clocks(encoder, port);
I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
val = I915_READ(MIPI_DSI_FUNC_PRG(port));
val &= ~VID_MODE_FORMAT_MASK;
I915_WRITE(MIPI_DSI_FUNC_PRG(port), val);
I915_WRITE(MIPI_DEVICE_READY(port), 0x1);
}
}
}
static int intel_dsi_get_modes(struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct drm_display_mode *mode;
DRM_DEBUG_KMS("\n");
if (!intel_connector->panel.fixed_mode) {
DRM_DEBUG_KMS("no fixed mode\n");
return 0;
}
mode = drm_mode_duplicate(connector->dev,
intel_connector->panel.fixed_mode);
if (!mode) {
DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
return 0;
}
drm_mode_probed_add(connector, mode);
return 1;
}
static void intel_dsi_connector_destroy(struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
DRM_DEBUG_KMS("\n");
intel_panel_fini(&intel_connector->panel);
drm_connector_cleanup(connector);
kfree(connector);
}
static void intel_dsi_encoder_destroy(struct drm_encoder *encoder)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
/* dispose of the gpios */
if (intel_dsi->gpio_panel)
gpiod_put(intel_dsi->gpio_panel);
intel_encoder_destroy(encoder);
}
static const struct drm_encoder_funcs intel_dsi_funcs = {
.destroy = intel_dsi_encoder_destroy,
};
static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
.get_modes = intel_dsi_get_modes,
.mode_valid = intel_dsi_mode_valid,
.atomic_check = intel_digital_connector_atomic_check,
};
static const struct drm_connector_funcs intel_dsi_connector_funcs = {
.late_register = intel_connector_register,
.early_unregister = intel_connector_unregister,
.destroy = intel_dsi_connector_destroy,
.fill_modes = drm_helper_probe_single_connector_modes,
.atomic_get_property = intel_digital_connector_atomic_get_property,
.atomic_set_property = intel_digital_connector_atomic_set_property,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.atomic_duplicate_state = intel_digital_connector_duplicate_state,
};
static void intel_dsi_add_properties(struct intel_connector *connector)
{
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
if (connector->panel.fixed_mode) {
u32 allowed_scalers;
allowed_scalers = BIT(DRM_MODE_SCALE_ASPECT) | BIT(DRM_MODE_SCALE_FULLSCREEN);
if (!HAS_GMCH_DISPLAY(dev_priv))
allowed_scalers |= BIT(DRM_MODE_SCALE_CENTER);
drm_connector_attach_scaling_mode_property(&connector->base,
allowed_scalers);
connector->base.state->scaling_mode = DRM_MODE_SCALE_ASPECT;
}
}
void intel_dsi_init(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
struct intel_dsi *intel_dsi;
struct intel_encoder *intel_encoder;
struct drm_encoder *encoder;
struct intel_connector *intel_connector;
struct drm_connector *connector;
struct drm_display_mode *scan, *fixed_mode = NULL;
enum port port;
DRM_DEBUG_KMS("\n");
/* There is no detection method for MIPI so rely on VBT */
if (!intel_bios_is_dsi_present(dev_priv, &port))
return;
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
} else if (IS_GEN9_LP(dev_priv)) {
dev_priv->mipi_mmio_base = BXT_MIPI_BASE;
} else {
DRM_ERROR("Unsupported Mipi device to reg base");
return;
}
intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL);
if (!intel_dsi)
return;
intel_connector = intel_connector_alloc();
if (!intel_connector) {
kfree(intel_dsi);
return;
}
intel_encoder = &intel_dsi->base;
encoder = &intel_encoder->base;
intel_dsi->attached_connector = intel_connector;
connector = &intel_connector->base;
drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI,
"DSI %c", port_name(port));
intel_encoder->compute_config = intel_dsi_compute_config;
intel_encoder->pre_enable = intel_dsi_pre_enable;
intel_encoder->enable = intel_dsi_enable_nop;
intel_encoder->disable = intel_dsi_disable;
intel_encoder->post_disable = intel_dsi_post_disable;
intel_encoder->get_hw_state = intel_dsi_get_hw_state;
intel_encoder->get_config = intel_dsi_get_config;
intel_connector->get_hw_state = intel_connector_get_hw_state;
intel_encoder->port = port;
/*
* On BYT/CHV, pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI
* port C. BXT isn't limited like this.
*/
if (IS_GEN9_LP(dev_priv))
intel_encoder->crtc_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C);
else if (port == PORT_A)
intel_encoder->crtc_mask = BIT(PIPE_A);
else
intel_encoder->crtc_mask = BIT(PIPE_B);
if (dev_priv->vbt.dsi.config->dual_link)
intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
else
intel_dsi->ports = BIT(port);
intel_dsi->dcs_backlight_ports = dev_priv->vbt.dsi.bl_ports;
intel_dsi->dcs_cabc_ports = dev_priv->vbt.dsi.cabc_ports;
/* Create a DSI host (and a device) for each port. */
for_each_dsi_port(port, intel_dsi->ports) {
struct intel_dsi_host *host;
host = intel_dsi_host_init(intel_dsi, port);
if (!host)
goto err;
intel_dsi->dsi_hosts[port] = host;
}
if (!intel_dsi_vbt_init(intel_dsi, MIPI_DSI_GENERIC_PANEL_ID)) {
DRM_DEBUG_KMS("no device found\n");
goto err;
}
/*
* In case of BYT with CRC PMIC, we need to use GPIO for
* Panel control.
*/
if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
(dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC)) {
intel_dsi->gpio_panel =
gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH);
if (IS_ERR(intel_dsi->gpio_panel)) {
DRM_ERROR("Failed to own gpio for panel control\n");
intel_dsi->gpio_panel = NULL;
}
}
intel_encoder->type = INTEL_OUTPUT_DSI;
intel_encoder->power_domain = POWER_DOMAIN_PORT_DSI;
intel_encoder->cloneable = 0;
drm_connector_init(dev, connector, &intel_dsi_connector_funcs,
DRM_MODE_CONNECTOR_DSI);
drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs);
connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
intel_connector_attach_encoder(intel_connector, intel_encoder);
mutex_lock(&dev->mode_config.mutex);
intel_dsi_vbt_get_modes(intel_dsi);
list_for_each_entry(scan, &connector->probed_modes, head) {
if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
fixed_mode = drm_mode_duplicate(dev, scan);
break;
}
}
mutex_unlock(&dev->mode_config.mutex);
if (!fixed_mode) {
DRM_DEBUG_KMS("no fixed mode\n");
goto err;
}
connector->display_info.width_mm = fixed_mode->width_mm;
connector->display_info.height_mm = fixed_mode->height_mm;
intel_panel_init(&intel_connector->panel, fixed_mode, NULL, NULL);
intel_panel_setup_backlight(connector, INVALID_PIPE);
intel_dsi_add_properties(intel_connector);
return;
err:
drm_encoder_cleanup(&intel_encoder->base);
kfree(intel_dsi);
kfree(intel_connector);
}
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